circleofcircuits
New Member
Hey guys,
I am new to this board and to electronics in general. When I was a little kid back in the 80s, my uncle built me a little box that, on the outside, had only an 8 segment LED array, a rheostat and an on/off switch. The box simply controlled the LED array and the circuitry made the LEDS go back and forth, The rheostat would control the speed of the back and forth motion.
Long story short, my uncle passed and in cleaning out his stuff, I found the schematic he drew to build the box for me. I no longer have mine but I want to build another one, and I want to build it exactly the way my uncle did, using the same components. I'm sure things have improved in 25 years but I want this just the way he built it.
I have all the required components (ICs, pot, capacitors and resistors, etc) mounted on a solderless breadboard, but I can't for the life of me get it to work. I attach a 9v battery and only the first LED lights up, even if the potentiometer is disconnected!
If you guys could guide me through this, it would mean a lot to me. I've attached a pic of the schematic (cleaned up a bit as some was hard to read) along with some pics of my breadboard.
Thanks,
Kyle
I am new to this board and to electronics in general. When I was a little kid back in the 80s, my uncle built me a little box that, on the outside, had only an 8 segment LED array, a rheostat and an on/off switch. The box simply controlled the LED array and the circuitry made the LEDS go back and forth, The rheostat would control the speed of the back and forth motion.
Long story short, my uncle passed and in cleaning out his stuff, I found the schematic he drew to build the box for me. I no longer have mine but I want to build another one, and I want to build it exactly the way my uncle did, using the same components. I'm sure things have improved in 25 years but I want this just the way he built it.
I have all the required components (ICs, pot, capacitors and resistors, etc) mounted on a solderless breadboard, but I can't for the life of me get it to work. I attach a 9v battery and only the first LED lights up, even if the potentiometer is disconnected!
If you guys could guide me through this, it would mean a lot to me. I've attached a pic of the schematic (cleaned up a bit as some was hard to read) along with some pics of my breadboard.
Thanks,
Kyle
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